Journal of Environmental Conservation Engineering
Online ISSN : 1882-8590
Print ISSN : 0388-9459
ISSN-L : 0388-9459
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Volume 16, Issue 12
Displaying 1-10 of 10 articles from this issue
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  • [title in Japanese]
    Nobuo MUTO
    1987 Volume 16 Issue 12 Pages 781-784
    Published: December 30, 1987
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.16.781
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Hiroshi NAKANISHI, Masayuki FUKAGAWA, Sadaaki MURAKAMI
    1987 Volume 16 Issue 12 Pages 785-792
    Published: December 30, 1987
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.16.785
    JOURNAL FREE ACCESS
    Download PDF (1066K)
  • [title in Japanese]
    Yosiaki KISO, Takane KITAO
    1987 Volume 16 Issue 12 Pages 793-797
    Published: December 30, 1987
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.16.793
    JOURNAL FREE ACCESS
    Download PDF (689K)
  • [title in Japanese]
    Hiroshi ISHIDA, Kiyoshi IZUMI, Masashi MORO, Mineo TACHIBANA
    1987 Volume 16 Issue 12 Pages 798-802
    Published: December 30, 1987
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.16.798
    JOURNAL FREE ACCESS
    Download PDF (633K)
  • [title in Japanese]
    Hikoyoshi KANAYAMA, Akira SAKAZKI, Yusaburo KUMAGAI, Kotaro HAMA, Take ...
    1987 Volume 16 Issue 12 Pages 803-807
    Published: December 30, 1987
    Released on J-STAGE: July 22, 2010
    DOIhttps://doi.org/10.5956/jriet.16.803
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Osamu TOJIMA
    1987 Volume 16 Issue 12 Pages 808-810
    Published: December 30, 1987
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.16.808
    JOURNAL FREE ACCESS
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  • Methane Gas Production from Fishmeal Factory Wastewater
    Toshinori KAMEOKA, Michio SAKIMOTO, Yoichi INNO
    1987 Volume 16 Issue 12 Pages 811-816
    Published: December 30, 1987
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.16.811
    JOURNAL FREE ACCESS
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    Fishmeal factory wastewater (FFW) was anaerobically fermented. Volatile solid (VS) and BOD of FFW were 78, 200mg/l and 60, 100mg/l, respectively. BOD/VS ratio was 0.77. It was thought that FFW is subjected to biochemical degradation. But, constant methane production was low because of containing colloidal protein in the proportion of 80% to VS. The authors made it possible by development of the following processes.
    1) The colloidal protein from FFW was aggregated to remove by addition of acetic acid in the proportion of 1%.
    2) Methane gas was constantly generated by removing NH3 and H2S from digested water by stripping using H2SO4 and Fe2O3 as adsorbents. Gas production ratio was 0.62l/g-VS. On the methane gas production of FFW, the removal ratio of BOD and COD were 91.4%, 40.4% respectively.
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  • Exess Attenuation of Aircraft Noise around Osaka International Airport
    Noboru KATAOKA, Hiroshi MIZUTANI
    1987 Volume 16 Issue 12 Pages 817-822
    Published: December 30, 1987
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.16.817
    JOURNAL FREE ACCESS
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    In prediction of aircraft noise, it is very important to calculate the attenuation. Especially far from aircraft, it must be considered not only attenuation for the distance but also ground effect and atmospheric attenuation. In this paper, propagation characteristics of aircraft noise which were mesured around Osaka International Airport were studied. Consequently, exess attenuation under 30 degree of elevation angle except attenuation for the distance could be show by logaristic function. The tendency of horizontal attenuation was about the same as the results of experiments by Parkin et al. In comparison the mesured exess attenuation with the culculation method of ground effect by SAE (Society of Automotive Engeneers), it was found out that the correspondence are quite satisfactory. Then the exess attenuation can calculate easily by converting EPN dB of SAE 's calculation method into dB (A) and giving some collection.
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  • [title in Japanese]
    Tadahiro OHMI, Nobuo MIKOSHIBA
    1987 Volume 16 Issue 12 Pages 823-832
    Published: December 30, 1987
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.16.823
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Aritomo NAKANO
    1987 Volume 16 Issue 12 Pages 833-838
    Published: December 30, 1987
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.16.833
    JOURNAL FREE ACCESS
    Download PDF (662K)
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